In this exercise we shall look at some data from the 2005 M.Sc. questionnaire.
The following graph shows the distribution of stress recorded on a 100mm visual analogue scale (VAS):
The stress question originally went from highest stress = 0 to lowest stress = 100. This has been reversed so that a high score = high stress.
1. What kind of variable is VAS stress?
2. What kind of graph is this?
3. Where are the mode, the lower tail and the upper tail of this distribution?
Check suggested answer 3.
4. How would you describe the shape of the distribution and why?
5. From the graph, approximately what would you estimate the median and the first and third quartiles to be? Where would they appear along the horizontal axis?
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This page maintained by Martin Bland.
Last updated: 9 October, 2006.
